中年 (zhōng nián): วัยกลางคน

His father has entered middle age, but he still insists on exercising every day.

The stress of middle-aged people usually comes from work and family.

Although she has already reached middle age, she still looks very young.

Many people don't start paying attention to health until middle age.

He is in middle age, with both career and family stable.

Middle age is an important stage in life, requiring a balance between work and health.

Many middle-aged people begin to pay attention to health preservation and exercise.

Midlife crisis is a common psychological phenomenon.